The Forced Oscillation Technique (FOT) offers a modern and reliable but economical method for the impedance measurement of respiratory system.
During test the patient is only asked to breath normally and no respiratory manoeuvre is needed.
Since the test requires minimum co-operation from the patients, the FOT device is and uniquely applicable in paediatric pulmonology
Measurement of the components of the airway impedance at different frequencies
Determination of the resonance frequency of the airways
Average calculation of Reproducible Impedance Spectra
Model evaluation of Impedance Spectra
Calculation of Resistance / Elastance / Inertance of the respiratory system
Random induced frequencies
Sequential induced frequencies
Measurement modes
Respiratory impedance measurement
FVC measurement
IVC measurement
MVV measurement
Measured parameters
Forced Oscillation Technique
Rrs Resistive component of respiratory impedance
Irs Inertance of the airways
Crs Compliance of the respiratory system
fres Resonance frequency
Forced ex and inspiration
FVC - Forced Vital Capacity
FEV*0.5 Forced Expiratory Volume in 0.5 second
FEV*1.0 Forced Expiratory Volume in 1.0 second
FEV*0.5/IVC Ration of FEV*0.5 and IVC in %
FEV*0.5/FVC Ration of FEV*0.5 and FVC in %
FEV*1.0/IVC Ration of FEV*1.0 and IVC in %
FEV*1.0/FVC Ration of FEV*1.0 and FVC in %
PEF - Peak Expiratory Flow
FEF*25-75% Forced mid-Expiratory Flow rate
FEF*75% Forced Expiratory Flow at 75% lung volume
FEF*50% Forced Expiratory Flow at 50% lung volume
FEF*25% Forced Expiratory Flow at 25% lung volume